How fast will a 3 phase EV charger charge a 1 phase EV?

8743 Views 24 Replies 12 Participants Last post by b789pilot, Jul 28, 2021

meetyg

Discussion Starter · Dec 25, 2020

As I have 3 phase AC (400v, 3x25 amps total) at home, I was wondering how fast a 3 phase charger will charge an EV that has 1 phase on-board charger ?

For example, I was told that a 3 phase charger connected to my home AC would be set at 16 amps per phase, and total output would be around 11kw.
But, I'm awaiting delivery of a Corsa-e which has a 7kw OBC (1 phase).
Will it be able to charge at 7kw? How does this work, when input of charger is 3 phase, and OBC is just one phase?
Will it take just one of three phase lines, giving a maximum of 3.6kw (220v x 16 amps)?

I'd appreciate you inputs on this as it worries me that although I have 3 phase AC, it will actually be a disadvantage with a 1 phase OBC on the EV.

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cah197

· #2 · Dec 25, 2020

Yes, it will use just one phase, at 25 Amps.

So about 5.5 kW.

I thought the Corsa came with 11 kW three phase on board charger?

In any case, you’ll probably find that 25 Amp single phase charging works just fine most of the time. Especially as the Corsa doesn’t have a particularly large battery.

meetyg

Discussion Starter · #3 · Dec 25, 2020

It won't charge at 25 amps I was told, as they will limit the unit to 16 amps, in order to leave some room for other household appliances.

But thats what I was afraid of... 😕
Well, I guess 3 phase will be useful for my next EV (hoping the charge point will last that long)

The Corsa-e doesn't have an 11kw option here in Israel unfortunately. The Peugeot e208 does have that option here, but its pretty costly (costs twice as much as the option in the UK

) . So I suppose that even if the Corsa-e here had that option, I'm not sure I would spend the extra money on it anyways.

cah197

· #4 · Dec 25, 2020

meetyg said:
It won't charge at 25 amps I was told, as they will limit the unit to 16 amps, in order to leave some room for other household appliances.

Do you mean the charger is limited to 16 Amps?

meetyg

Discussion Starter · #5 · Dec 25, 2020

Per phase, yes. Its total output would be 11kw

cDy

· #6 · Dec 25, 2020

For Germany and, I think, the UK the e-Corsa has a 3-phase, 11kW charger in the car that I think can configure itself to charge at 7kW from a single phase. I think you are having a 3 phase charger installed (set at 16A per phase) which is perfect to exploit the on board charger on your e-Corsa, provided it has a 3-phase on board charger. You need to check on the specification for your car in your local market.

EricM

· #7 · Dec 25, 2020

If the car has only got a single phase on board charger then it will only connect to one phase of a 3 phase supply. If the wall unit has been limited to 16 amps per phase, then the car's charger will only receive 16A. If Israel's standard household voltage is 230v per phase (like EU) then car should get around 3.68kW but it could just as easily be 240v (like the UK was when Palestine was under the British Mandate ) which would give 3.84kW or indeed it might be anywhere between 211V & 253V as the current EU & UK standards allow.

cah197

· #8 · Dec 25, 2020

meetyg said:
Per phase, yes. Its total output would be 11kw

It’s just you said it was 25 amps per phase in your OP.

Normally the home appliances can be set up to use a different phase to the one the car is on.

mikegs

· #9 · Dec 25, 2020

cah197 said:
It’s just you said it was 25 amps per phase in your OP.

The supply to his home - not the charger.

meetyg

Discussion Starter · #10 · Dec 25, 2020

EricM said:
If the car has only got a single phase on board charger then it will only connect to one phase of a 3 phase supply. If the wall unit has been limited to 16 amps per phase, then the car's charger will only receive 16A. If Israel's standard household voltage is 230v per phase (like EU) then car should get around 3.68kW but it could just as easily be 240v (like the UK was when Palestine was under the British Mandate ) which would give 3.84kW or indeed it might be anywhere between 211V & 253V as the current EU & UK standards allow.

Our nominal voltage is 230v, but I think standards allow it to down to 220v. Not a big difference anyways, compared to 7.4kw.

b789pilot

· #11 · Dec 25, 2020

The Corsa-e is available with either 7kW or 11kW OBC in the UK. However, I don’t think they have started to import the 11kW version yet, if ever. No idea whether the 11kW version is single or three phase. The 7kW is only single phase.

80698

· #12 · Dec 25, 2020

b789pilot said:
No idea whether the 11kW version is single or three phase

3 Phase, 16 Amps (~3.6kW) per phase.

Reactions: 1

proddick

· #13 · Dec 25, 2020

meetyg said:
Will it take just one of three phase lines, giving a maximum of 3.6kw (220v x 16 amps)?

Unfortunately YES. If 3 phase is common in homes it is a shame the Corsa isn't available with the 11kW charging option there.

How many miles do you drive a day? Charging for 10 hours overnight would be around 30kWh so a decent range. I often charge my Zoe at 16A as my Podpoint Type 2 charging point replaced the Type 1 from Ampera and wiring can't cope with much more (it probably could do 20A).

meetyg

Discussion Starter · #14 · Dec 26, 2020 (Edited)

I usually do around 70 km a day, 4 to 5 days a week.
I was hoping that I would be able to charge just once a week, for about 10 hours. I guess that I could get along with 3.6kw charging just fine for that once a week nightly charge (given that I won't deplete the battery to 0%). What more concerns me is those times when you need a little boost of charge in the middle of the day, or before going for a longer drive.
I know I could use public chargers for that matter (especially DC rapid chargers), but that is more of an inconvenience. Especially since we don't have much DC chargers where I live, and in any case public charging is more costly.

Yes, I know that I can't compare DC charging to a home charger at 7.4kw, but still, 7.4kw means twice as fast charging (giving around 40km per hour instead of around 20km of range, at 3.6kw).

I guess I will just have to live with it...

Most homes here do not have 3 phase. Usually larger homes do...

In my previous apartment we had 40 amp single phase, which is more or less standard.
Thats the absurd: a standard single phase AC could have charged at around 20 amps, while here i will be charging at 16amps even though I have three phase.

Anyways, I guess the reason 3 phase OBCs are not so common here (yet) is because they are costly, and most apartments have single phase anyways.

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cah197

· #15 · Dec 26, 2020

Just charge it up every night.

It’s about as difficult as plugging in your phone each night.

You need to get out of the ICE habits. One of the key benefits of an EV is always having a full tank.

meetyg

Discussion Starter · #16 · Dec 26, 2020

cah197 said:
Just charge it up every night.

It’s about as difficult as plugging in your phone each night.

You need to get out of the ICE habits. One of the key benefits of an EV is always having a full tank.

Yeah, I guess i will need to adapt to having an EV.
Now I'm hoping that the lock down we are going into next week won't delay the delivery of the car

Dealer says he thinks it won't (compared to previous one) , but we will have to wait and see...

proddick

· #17 · Dec 26, 2020

meetyg said:
I usually do around 70 km a day, 4 to 5 days a week.
I was hoping that I would be able to charge just once a week, for about 10 hours. I guess that I could get along with 3.6kw charging just fine for that once a week nightly charge (given that I won't deplete the battery to 0%). What more concerns me is those times when you need a little boost of charge in the middle of the day, or before going for a longer drive.

As @cah197 says, just plug in every night and you won't need a charge in middle of day. On most nights you could limit charge if Corsa has that feature (our Zoes don't) and just charge fully when necessary. Personally, it isn't something I worry about, but there are some on here who are paranoid and never fully charge their EV. But each to their own...

Reactions: 2

Dr Prasad

· #18 · May 27, 2021

meetyg said:
As I have 3 phase AC (400v, 3x25 amps total) at home, I was wondering how fast a 3 phase charger will charge an EV that has 1 phase on-board charger ?

For example, I was told that a 3 phase charger connected to my home AC would be set at 16 amps per phase, and total output would be around 11kw.
But, I'm awaiting delivery of a Corsa-e which has a 7kw OBC (1 phase).
Will it be able to charge at 7kw? How does this work, when input of charger is 3 phase, and OBC is just one phase?
Will it take just one of three phase lines, giving a maximum of 3.6kw (220v x 16 amps)?

I'd appreciate you inputs on this as it worries me that although I have 3 phase AC, it will actually be a disadvantage with a 1 phase OBC on the EV.

mrblonde

· #19 · Jul 27, 2021

Isn't it possible to buy a charger that combines 3 phases into 1 and achieve the 7,4kW speed?

mrblonde

· #20 · Jul 27, 2021

EVTUN

Electric car chargers, wallboxes and range extenders

evtun.com

But might not gain speed. Only with select cars it seems.

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